Yesterday was, my Sister-in-law, Sarah's Birthday! So Happy Birthday to her! And yes, I do know nail guns have a pressure sensitive thing on them so that the nails don't go flying all willy-nilly, and No, I'm not really sure how this happened. Thomas, Craig or my Dad will tell you. All's I know is that Sarah don't mess around with no minor details. She is also a nurse and knows about things.